Abstract: A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.

Abstract: A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.

Abstract: A system for controlling noise for a sound receiving device directs noise towards the sound-receiving back side of a bi-directional microphone and directs the user's voice away from the back side. The bi-directional microphone is electrically connected to plug adapted for mating with an external microphone input jack of the sound receiving device. A resistor is connected in series with the bi-directional microphone and operates to attenuate the detected sound signal of the bi-directional microphone in order to overcome signal enhancement expedients of the sound receiving device, such as compression and clipping due to for example automatic gain control.

Abstract: An apparatus is disclosed for the cancellation of ambient noise that impinges upon the front surface of a pressure differential microphone means. The apparatus utilizes one or more curved surfaces that act as ambient noise waveform reflectors. The reflectors cause ambient noise to impinge on the back surface of the microphone. In addition, the reflectors deflect a speaker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

Abstract: An apparatus for noise cancellation of ambient noise impinging upon the front surface of a pressure differential microphone on the end of a boom. The apparatus utilizes curved reflectors to cause ambient noise which impinges on the front surface of the microphone to also impinge on the back surface of the microphone. In addition, the curved reflectors cause a talker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

Abstract: An apparatus for noise cancellation of ambient noise impinging upon the front surface of a pressure differential microphone. The apparatus utilizes curved reflectors to cause ambient noise which impinges on the front surface of the microphone to also impinge on the back surface of the microphone. In addition, the curved reflectors deflect a speaker's voice which is directed toward the front surface of the microphone to be deflected away from the back surface of the microphone.

Abstract: The ambient broadband radio frequency field strength from broadcast stations is monitored (FIG. 4) by periodic sampling (50, 52). A warning indication is provided if the field strength drops significantly. Drops in such field strength have been correlated empirically with the occurrence of seismic activity, usually several days later. Thus the indication serves as an early warning of an impending earthquake. In one preferred embodiment, a broadband, horizontal, very long monopole antenna (40) was connected to a rectifying and smoothing circuit (FIG. 3) to provide a dc output proportional to the ambient rf field. This voltage is digitized (50), and using a suitably-programmed computer (52), the digital version of the field strength signal is sampled once per minute (78). A cumulative or running average of the minute samples is calculated (80) and held. Once per hour the latest running average is stored (84) and a standard deviation (SD) of the last 24 hourly stored running averages is calculated (88).